\begin{table}[h]
 \centering
 \subtable[$key_5=8401$]{
     \begin{tabular}{cc}
         0.0530 & \_\_5f \\
         0.0530 & \_\_4f \\
         0.0520 & \_\_98 \\
         0.0520 & \_\_01 \\
         0.0480 & \_\_58 \\
         0.0480 & \_\_9b \\
         0.0460 & \_\_0f \\
         0.0440 & \_\_b2 \\
         0.0410 & \_\_34 \\
         0.0400 & \_\_1f \\
     \end{tabular}
 }
 \subtable[$key_5=c603$]{
     \begin{tabular}{cc}
         0.0930 & \_\_03 \\
         0.0740 & \_\_e3 \\
         0.0670 & \_\_13 \\
         0.0640 & \_\_f3 \\
         0.0600 & \_\_f2 \\
         0.0510 & \_\_06 \\
         0.0500 & \_\_e2 \\
         0.0500 & \_\_53 \\
         0.0490 & \_\_02 \\
         0.0490 & \_\_0d \\
     \end{tabular}
 }
\end{table}
